The 200 is excellent for composting kitchen scraps and a few cut up garden trimmings. Operation of the 200: In the 200, material is added by sliding the input door open. To mix and aerate the compost, the drum is rotated using four finger friendly slots running along the outside of the drum. Compost is removed by opening the output port, rotating the drum and allowing compost to fall from the inner drum into a bushel basket or other container.